Glenn Close, Kathleen Turner and Dominic Cooper gave actor Daniel Radcliffe a rousing reception as he made his Broadway debut in Equus on Thursday.

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The Harry Potter star took to the stage at New York's Broadhurst Theatre and received rave reviews from co-stars and celebrity theatregoers for his first outing in the city's famed theatre district.

Preview showings began earlier this month, but Thursday was Equus' official opening night.

Radcliffe, who plays a disturbed teenager with a sexual interest in horses, admitted he was "terrified" about his Big Apple theatre debut as the role required him to perform naked again.

But Turner, who herself appeared nude in her West End performance of The Graduate, congratulated the young star on taking a risk.

She says, "If it's in the play, if it's in the story, if it's necessary, then it's right. The fact that he's willing to learn and risk is all to his credit."

And Radcliffe's co-star and fellow Harry Potter actor Richard Griffiths praised the 19-year-old's performance, saying he had come a long way since his West End debut in 2006.

He adds, "He's not a kid anymore. He's a young man and he deserves whatever breaks that brings."

The stage show's stars celebrated Radcliffe's turn with an opening night party for 400 guests.